package com.cuit.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.cuit.eduservice.entity.EduSubject;
import com.cuit.eduservice.entity.excel.SubjectData;
import com.cuit.eduservice.service.EduSubjectService;
import com.cuit.exception.MyException;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    public EduSubjectService subjectService;

    public SubjectExcelListener() {}

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    //读取excel中数据
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData==null){
            throw new MyException(20001,"文件数据为空");
        }
        //一行一行读取
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if(existOneSubject==null){
            existOneSubject=new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());//一级分类名称
            subjectService.save(existOneSubject);
        }
        //pid 为一级分类id值
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), existOneSubject.getId());
        if(existTwoSubject==null){
            existTwoSubject=new EduSubject();
            existTwoSubject.setParentId(existOneSubject.getId());
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());//一级分类名称
            subjectService.save(existTwoSubject);
        }
    }

    //判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService,String title){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",title);
        wrapper.eq("parent_id","0");
        return subjectService.getOne(wrapper);
    }

    //判断一级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService,String title,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",title);
        wrapper.eq("parent_id",pid);
        return subjectService.getOne(wrapper);
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
